I’ve never tried the cast loads in a alloy frame but I have had to pull bullets after I’ve loaded them and it takes several good whacks with a kinetic bullet puller to get the bullets out.
Loaded right with the crimp is in the crimp groove it takes much more force to bend that brass back out than you get with recoil.
All I can say is that I have a Scandium alloy framed Governor and like most of their lightweights, S&W cautions about testing the ammo for slug separation before continued use of that ammo. I tried several different kinds from Super X, to Hornady, and the 185 grain didn’t separate at all. Some of the ones I tried were factory crimped and it didn’t matter.
If you really want to try and separate slugs from cases, try some old 45 ACP made during WWII. That stuff is TIGHT! Some of it (Remington) was sealed with some sort of glue that forced me to go down a size in the collet puller of my Leeman to get them out. Ended up completely deforming the slugs. I even wrote a paper/article about Dewating this old WWII ammo.